Hi BeeBop,
Wow, i havent seen one of those things in ages now, thanks for posting.
Just a tiny problem however...
The two output diodes are connected such that neither one of them
will ever conduct, so there has got to be a problem with the connection
of those two. Perhaps you can find the error and correct this schematic?
Thanks.
They're zeners, and they are in series. When the voltage across the reverse biased one reaches 5.1V it begins to conduct. The forward biased one then acts like a normal diode. Same thing for the other direction.
I assumed the diodes were in parellel with each other, because that's how the wien bridge circuits I've built have worked.
Yes, I recall trying some like that, and some with a light bulb, but this one seemed the simplest one which worked.
When I get some time later today, I'll breadboard this one and have a play with it...take some measurements....
Edit> Oh wait, I see the problem! They are marked as small signal! I think I did this one when I first started using EAGLE, and couldn't find a zener in the library.
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